The crucial point about ethnic cleansing is not about whether what drove people into exile was forcable expulsion or just fear of war, it is about whether they are permitted to return home subsequently, or whether they are refused this right, and their absence is used as an opportunity by others to take over the land from which they fled and wipe out the traces of their existence.

That is true of the Jews in Arab states at the time of the "Nakba."
There were many more of them than Arab refugees, but Israel took them all in on their tiny sliver of land, while the Arab refugees in Arab lands were denied citizenship and employment rights and kept in squalid camps to the present day.
Israel took in far more refugees than left, and is not responsible for the plight of those who left